Buggy code:
public class ReleaseNotesGenerator extends GeneratorBase { private static final String USAGE = "Usage:\n" + ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( "\n" + "<seq2seq4repair_space>java<seq2seq4repair_space>org.apache.derbyBuild.ReleaseNotesGenerator<seq2seq4repair_space>SUMMARY<seq2seq4repair_space>BUG_LIST<seq2seq4repair_space>OUTPUT_PAMPHLET\n" ) + "\n" ) + "<seq2seq4repair_space>where\n" ) + "<seq2seq4repair_space>SUMMARY<seq2seq4repair_space>Summary,<seq2seq4repair_space>a<seq2seq4repair_space>filled-in<seq2seq4repair_space>copy<seq2seq4repair_space>of<seq2seq4repair_space>releaseSummaryTemplate.xml.\n" ) + "<seq2seq4repair_space>BUG_LIST<seq2seq4repair_space>A<seq2seq4repair_space>report<seq2seq4repair_space>of<seq2seq4repair_space>issues<seq2seq4repair_space>addressed<seq2seq4repair_space>by<seq2seq4repair_space>this<seq2seq4repair_space>release,<seq2seq4repair_space>generated<seq2seq4repair_space>by<seq2seq4repair_space>the<seq2seq4repair_space>Derby<seq2seq4repair_space>JIRA<seq2seq4repair_space>SOAP<seq2seq4repair_space>client.\n" ) + "<seq2seq4repair_space>OUTPUT_PAMPHLET<seq2seq4repair_space>The<seq2seq4repair_space>output<seq2seq4repair_space>file<seq2seq4repair_space>to<seq2seq4repair_space>generate,<seq2seq4repair_space>typically<seq2seq4repair_space>RELEASE-NOTES.html.\n" ) + "\n" ) + "The<seq2seq4repair_space>ReleaseNoteGenerator<seq2seq4repair_space>attempts<seq2seq4repair_space>to<seq2seq4repair_space>connect<seq2seq4repair_space>to<seq2seq4repair_space>issues.apache.org<seq2seq4repair_space>in\n" ) + "order<seq2seq4repair_space>to<seq2seq4repair_space>read<seq2seq4repair_space>the<seq2seq4repair_space>detailed<seq2seq4repair_space>release<seq2seq4repair_space>notes<seq2seq4repair_space>that<seq2seq4repair_space>have<seq2seq4repair_space>been<seq2seq4repair_space>clipped<seq2seq4repair_space>to\n" ) + "individual<seq2seq4repair_space>JIRAs.<seq2seq4repair_space>Before<seq2seq4repair_space>running<seq2seq4repair_space>this<seq2seq4repair_space>program,<seq2seq4repair_space>make<seq2seq4repair_space>sure<seq2seq4repair_space>that<seq2seq4repair_space>you<seq2seq4repair_space>can\n" ) + "ping<seq2seq4repair_space>issues.apache.org.\n" ) + "\n" ) + "The<seq2seq4repair_space>ReleaseNoteGenerator<seq2seq4repair_space>assumes<seq2seq4repair_space>that<seq2seq4repair_space>the<seq2seq4repair_space>JIRA<seq2seq4repair_space>report<seq2seq4repair_space>contains\n" ) + "key,<seq2seq4repair_space>title,<seq2seq4repair_space>fix<seq2seq4repair_space>versions<seq2seq4repair_space>and<seq2seq4repair_space>attachment<seq2seq4repair_space>id<seq2seq4repair_space>elements<seq2seq4repair_space>for<seq2seq4repair_space>each<seq2seq4repair_space>Derby\n" ) + "issue.<seq2seq4repair_space>For<seq2seq4repair_space>each<seq2seq4repair_space>issue<seq2seq4repair_space>in<seq2seq4repair_space>with<seq2seq4repair_space>an<seq2seq4repair_space>attachment<seq2seq4repair_space>id<seq2seq4repair_space>element<seq2seq4repair_space>the\n" ) + "ReleaseNotesGenerator<seq2seq4repair_space>grabs<seq2seq4repair_space>the<seq2seq4repair_space>(latest)<seq2seq4repair_space>releaseNote.html<seq2seq4repair_space>file.\n" ) + "\n" ) + "For<seq2seq4repair_space>this<seq2seq4repair_space>reason,<seq2seq4repair_space>it<seq2seq4repair_space>is<seq2seq4repair_space>recommended<seq2seq4repair_space>that<seq2seq4repair_space>you<seq2seq4repair_space>freshly<seq2seq4repair_space>generate<seq2seq4repair_space>BUG_LIST\n" ) + "just<seq2seq4repair_space>before<seq2seq4repair_space>you<seq2seq4repair_space>run<seq2seq4repair_space>this<seq2seq4repair_space>tool.\n" ) ; private static final String OVERVIEW_SECTION = "Overview" ; private static final String NEW_FEATURES_SECTION = "New<seq2seq4repair_space>Features" ; private static final String BUG_FIXES_SECTION = "Bug<seq2seq4repair_space>Fixes" ; private static final String ISSUES_SECTION = "Issues" ; private static final String BUILD_ENVIRONMENT_SECTION = "Build<seq2seq4repair_space>Environment" ; private static final String RELEASE_VERIFICATION_SECTION = "Verifying<seq2seq4repair_space>Releases" ; private static final String ANT_HEADLINE = "Ant" ; private static final String BRANCH_HEADLINE = "Branch" ; private static final String COMPILER_HEADLINE = "Compiler" ; private static final String JAVA6_HEADLINE = "Java<seq2seq4repair_space>6" ; private static final String JDK14_HEADLINE = "JDK<seq2seq4repair_space>1.4" ; private static final String JSR169_HEADLINE = "JSR<seq2seq4repair_space>169" ; private static final String MACHINE_HEADLINE = "Machine" ; private static final String OSGI_HEADLINE = "OSGi" ; private static final String SUM_ANT_VERSION = "antVersion" ; private static final String SUM_COMPILER = "compilers" ; private static final String SUM_JAVA6 = "java6" ; private static final String SUM_JDK14 = "jdk1.4" ; private static final String SUM_JSR169 = "jsr169" ; private static final String SUM_MACHINE = "machine" ; private static final String SUM_NEW_FEATURES = "newFeatures" ; private static final String SUM_OSGI = "osgi" ; private static final String SUM_OVERVIEW = "overview" ; private static final String SUM_RELEASE_VERIFICATION = "releaseVerification" ; private ReleaseNoteReader releaseNoteReader = new ReleaseNoteReader ( docBldr ) ; private List < JiraIssue > missingReleaseNotes = new ArrayList < JiraIssue > ( ) ; public ReleaseNotesGenerator ( ) throws Exception { } public static void main ( String [ ] args ) throws Exception { } public void execute ( ) throws BuildException { } private void beginOutput ( ) throws Exception { } private void buildOverview ( ) throws Exception { } private void buildNewFeatures ( ) throws Exception { } private void parseBugsList ( ) throws Exception { } private void buildFixedBugsList ( ) throws Exception { } private void buildReleaseNoteIssuesList ( ) throws Exception { Element issuesSection = getSection ( outputDoc , MAIN_SECTION_LEVEL , ReleaseNotesGenerator . ISSUES_SECTION ) ; String deltaStatement = ( ( ( ( ( "Compared<seq2seq4repair_space>with<seq2seq4repair_space>the<seq2seq4repair_space>previous<seq2seq4repair_space>release<seq2seq4repair_space>(" + ( previousReleaseID ) ) + "),<seq2seq4repair_space>Derby<seq2seq4repair_space>release<seq2seq4repair_space>" ) + ( releaseID ) ) + "<seq2seq4repair_space>introduces<seq2seq4repair_space>the<seq2seq4repair_space>following<seq2seq4repair_space>" ) + "new<seq2seq4repair_space>features<seq2seq4repair_space>" ) + "and<seq2seq4repair_space>incompatibilities.<seq2seq4repair_space>These<seq2seq4repair_space>merit<seq2seq4repair_space>your<seq2seq4repair_space>special<seq2seq4repair_space>attention." ; addParagraph ( issuesSection , deltaStatement ) ; Element toc = createList ( issuesSection ) ; for ( Iterator i = bugList . iterator ( ) ; i . hasNext ( ) ; ) { JiraIssue issue = ( ( JiraIssue ) ( i . next ( ) ) ) ; if ( issue . hasReleaseNote ( ) ) { Node summaryText = null ; Element details = null ; try { URL url = new URL ( issue . getReleaseNoteAddress ( ) ) ; InputStream is = url . openStream ( ) ; Document releaseNote = releaseNoteReader . getReleaseNote ( is ) ; summaryText = releaseNoteReader . getReleaseNoteSummary ( releaseNote ) ; details = releaseNoteReader . getReleaseNoteDetails ( releaseNote ) ; } catch ( Throwable t ) { errors . add ( formatError ( ( ( "Unable<seq2seq4repair_space>to<seq2seq4repair_space>read<seq2seq4repair_space>or<seq2seq4repair_space>parse<seq2seq4repair_space>" + "release<seq2seq4repair_space>note<seq2seq4repair_space>for<seq2seq4repair_space>DERBY-" ) + ( issue . getKey ( ) ) ) , t ) ) ; missingReleaseNotes . add ( issue ) ; continue ; } String key = "Note<seq2seq4repair_space>for<seq2seq4repair_space>DERBY-" + ( issue . getKey ( ) ) ; <START_BUG> Element paragraph = outputDoc . createElement ( PARAGRAPH ) ; <END_BUG> paragraph . appendChild ( outputDoc . createTextNode ( ( key + ":<seq2seq4repair_space>" ) ) ) ; cloneChildren ( summaryText , paragraph ) ; insertLine ( issuesSection ) ; Element issueSection = createSection ( issuesSection , ISSUE_DETAIL_LEVEL , toc , key , paragraph ) ; cloneChildren ( details , issueSection ) ; } else if ( issue . hasMissingReleaseNote ( ) ) { missingReleaseNotes . add ( issue ) ; } } } private void buildEnvironment ( ) throws Exception { } private void buildReleaseVerification ( ) throws Exception { } private void printMissingReleaseNotes ( ) throws Exception { } private boolean parseArgs ( String [ ] args ) throws Exception { } }

Fix:
Element paragraph = outputDoc . createElement ( SPAN ) ;